Because Atonement becomes a Glorified Burst Strike+Hypervelocity with your Atonement gauge. Reworking PLD IMO means changing it entirely not fitting it into a 2 minute 15 second burst window with FoF. If they are going to make a small change like that they may as well roll it out in 6.25.

Seems like you just want Atonement spam as a playstyle.